We drove to the hotel Rex where we made reservations in advance. However, once there, two American guys told us that they had a voucher from a travel agent and the price was like half of it.We were considering flying to the same region again: we thought of going to Brazil, Venezuela or Guatemala. We were asking a lot of friends on their travel experiences to these countries.At noon we continued to the Altiplano to visit some lakes and volcanoes. At 4000 meter above see level it became suddenly extremely cold and our heads started to spin. Altitude sickness?